Optax

OPTAX is a modelling framework for applied taxation analysis. It is based on the computable general equilibrium (CGE) setting widely used by professionals and academics to study tax reforms and trade policies. ECOPA has added two key measures to this model: tax efficiency and equity: Marginal Cost of Funds and Marginal Effective Tax Rates. In addition, OPTAX uses to its full potential the power of recent numerical solvers to determine in one run the optimal tax structure, while capturing the distributional aspects and costs of reforms.